Science
A balloon filled with air is taken up a mountain with hiker. What is the pressure exerted on the balloon at sea level?May 22, 2015

chem
what are the three stages that it takes for an equilibrium to become established?April 29, 2015

Chemistry HW!!!
1. If I dilute 75 mL of 0.50 M CaF2 solution to a final volume of 375 mL, what will be the molarity of the resulting solution? 2. What will be the final volume of the solution be if I start with a 250 mL of 1.38 M MgCl2 solution to make a solution with a concentration of 0.30 ...March 11, 2015

chemistry
Ideal Mixed Gas Law problems 1. What is the pressure generated by a mixture of 25.6 g SO2 and 12.6 g Ne in a container of 72.45 L and temperature of 131 K? 2. What is the pressure of a mixture of 5.80 moles Kr and 2.71 moles Xe in a container with a volume of 205.6 Liters and ...February 23, 2015

chem
Show work 1. How many moles of oxygen will occupy a volume of 2.50 liters at 121.6 kPa and 331 K? 2. An unknown volume of chlorine gas (Cl2) is resting at 127 °C at a of pressure 152.4 kPa. If the gas weighs 191.4 g, what is the volume? 3. A 2.917 mole sample of an ideal ...February 22, 2015

Math
On January 31, a count of ending inventory was completed, and 7,200 units were on hand. Using the periodic inventory system, calculate the cost of goods sold and ending inventory using LIFO, FIFO, and weighted-average inventory methods.February 8, 2015

psychlogical statistics
A random selection of files from a student counseling center revealed the following reasons why college students seek services: Mental health issues - 25 Learning/school issues - 15 Relationship issues - 5 Other - 5 What is the probability that if we pulled another student ...January 24, 2015

CHEM MOLES !@@!
Mole Calculation Worksheet 1) How many moles are in 15 grams of lithium? 2) How many grams are in 2.4 moles of sulfur? 3) How many moles are in 22 grams of argon? 4) How many grams are in 88.1 moles of magnesium? 5) How many moles are in 2.3 grams of phosphorus? 6) How many ...December 16, 2014

chemistry
Avogadro's law states that, "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules". For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure...November 17, 2014

College Chemistry
Please tell me what I did wrong on this problem: Given the equation Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g), Calculate the number of grams of CO that can react with 0.370kg of Fe2O3 Here's what I did: .370kg x 1000 = 370g of Fe2O3 370g/[(55.85 x 2) + (13 x 3)] = 2.32 mol 2.32...November 1, 2014

Chemistry
need the answers to the formulas for the Ionic Compound: DiAmmonium Chromate Also I need the name of the following formula Sr(MnO4)2October 28, 2014

Trigonometry
A car traveling at a constant rate due east passes an interstate exit that is 1.0 mile from a gas station. The gas station is S50°E of the exit. After the car has traveled for 2.0 minutes, its bearing to the gas station is S55°W. How fast is the car traveling?September 29, 2014

Math
I'm a 5th grader and I'm having a hard time writing the above fractions in order. They are 3/10, 1, 1/4, 5/8, 2/3, 1/8, 5/6, 3/4, 0, 1/6, 7/8, 1/3? Am I suppose to find the least common denominator first?January 22, 2014

Science, Chemistry
A cylinder containing 11.0L of helium gas at a pressure of 165atm is to be used to fill birthday balloons to a volume of 2.50L per balloon and at a pressure of 1.10atm. What is the maximum number of balloons that can be inflated at a constant temperature? (remember that 11.0L ...October 21, 2013

statistics
a behavioral research situation that could use a Pearson coefficient research study and a chi square research study. Present the rationale for each selection. Be very specific in your presentation. When determining a correlation study, be sure and think about variables where ...September 29, 2013

Physics
A runner is jogging at a steady 2.7 km/hr. When the runner is 7.7 km from the finish line, a bird begins flying from the runner to the finish line at 5.4 km/hr (2 times as fast as the runner). When the bird reaches the finish line, it turns around and flies back to the runner...September 21, 2013

math
mary has outstanding preferred stock That pays a dividend of $4 per share and sells for $82 per share, with a floatation cost of $6 per share. What is the component cost for Coogly's preferred stock? What are the advantages and disadvantages of using preferred stock in the...April 17, 2013

Statistic
Heights of adult men have a mean of 69.0 inches and a standard deviation of 2.8 inches. Approximately what percentage of adult men have a height between 66.2 and 77.4 inches? Must show the number and the empirical ruleFebruary 19, 2013

Algebra
Unicycling. In 2005, Ken Looi of New Zealand set a record by covering 235.3 mi in 24 hr on his unicycle. After 8 hr, he was approximately twice as far from the finish line as he was from the start. How far had he traveled?January 30, 2013

Algebra
Price of a printer. Laura paid $219.45, including 5% tax, for an all-in-one color printer. How much did the printer itself cost?January 30, 2013

Algebra
Price of a calculator. Kayla paid $137.80, including 6% tax, for her graphing calculator. How much did the calculator itself cost?January 30, 2013

algebra
price of sneakers. Amy paid $102 for a paid of new balance 1122 running shoes during a 15%-off sale. What was the regular price?January 30, 2013

writing
Edit mMath Autobiography Theresa V. Monteiro MAT 095 11:00 AM  12:15 PM My name is Theresa and I am from Norwalk Connecticut. Ive been living here for a year now. I moved to New London Connecticut to start my life. Ive taken care of all my immediate family ...January 28, 2013

math
rocio finished 21 pages of a book in 3 days. monday she finished half of what she did on tuesday and wednesday she finished twice as much as she did on tuesday. how much did she read each day?January 15, 2013

Math
The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the following table. Because of the high physical demands of the job, the company's policy is a 23% allowance for workers. a) Compute the standard time for...January 9, 2013

Math
The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the following table. Because of the high physical demands of the job, the company's policy is a 23% allowance for workers. a) Compute the standard time for...January 2, 2013

Math
Find all the three digit numbers where the sum of of the first two digits equals the third digit.December 17, 2012

Human Services
Mandie a new social worker in a residential treatment facility for adolescent teens, notices a disparity between the privileges given to the white residents as opposed to the American African residents. Since she is new, she begins to ask subtle questions of the residential ...December 11, 2012

Math
The shorter edges of a 44cm x 25cm metal sheet are joined to form the curve surface of a cylinder. What is the volume of the cylinder? What is the area of metal sheet required to make the top and the bottom cylinder?August 15, 2012

math
The lengths of the edges of a rectangular block are integers and their total is 60. What is the greatest possible volume?August 15, 2012

physical science
how do you solve? a swimmimg pool is exactly 20m long, 7m wide, and 2m deep. What is its volume in cubic feet to 3 significant figures?July 5, 2012

Physics
A uniform rod AB of length 2a and mass M is freely pivoted at A and is held with B vertically above A. It is then allowed to fall and when B is vertically below A it strikes a stationary particle , also of mass M,which sticks to the rod at B. The rod then turns through a ...May 26, 2012

CUC
1.(a) A solid sphere of mass 100gm and radius 2.5cm rolls without sliding wit ha uniform velocity of 10cm/sec along a straight line on a smooth horizontal table. Calculate the total energy. (b) A hoop of radius 100cm and mass 19kg is rolling along a horizontal surface, so that...May 26, 2012

CUC
1.Two masses of 4gm and 6gm respectively are attached to the ends of a light rod of negligible mass and the rod rotates anticlockwise at the rate of 2rev/sec about an axis passing through the center of mass and perpendicular to its length. Calculate (a)the angular momentum of ...May 26, 2012

CUC
1. A rocket was found to be 150m when measured on earth.It then leaves and move at a constant velocity of 2 x 10m/s. What is its new length? 2. Two spaceships A and B are moving in opposite directions, A with a speed of 0.9c while B with a speed of 6c. Find the relative ...May 26, 2012

CUC
(a)Explain the term time dilation. (b) Show that an interval of time observed in a moving frame of reference will be less than the same interval observed in a stationary frame of reference.May 26, 2012

English
I need help writing a 150-200 word paragraph on Identify an introductory technique that could be used to grab the readers attention and showcase the main idea?March 29, 2012

math
related to last question -- why is the probability the same for yyy, xxx,zzz on the spinner with x y z thanksMarch 7, 2012

logic application
You are playing Guess Your Card with three other players. Here is what you see: Andy has the cards 1, 3, & 7 Belle has the cards 3, 4, & 7 Carol has the cards 4, 6, & 8 Andy draws the question card, Do you see two or more players whose cards sum to the ...February 29, 2012

strayer
You are playing Guess Your Card with three other players. Here is what you see: Andy has the cards 1, 3, & 7 Belle has the cards 3, 4, & 7 Carol has the cards 4, 6, & 8 Andy draws the question card, Do you see two or more players whose cards sum to the ...February 29, 2012

college/ pre-cal
a square fence 9 feet high enclosing a radio tower is 3 feet from the tower on all 4 sides. guy wires used to hold the tower in position are attached to the tower 30 feet above the ground and 13 feet from the fence on all 4 sides. How long are the guy wires to the nearest foot.February 23, 2012

SDSU
I need help solving Integral from 0 to (a/sqrt(b)) of (a^2-bx^2)^(3/2) I got (a^4/8sqrt(b)) - 3a^4pi/4sqrt(b)February 7, 2012

Math
Ms. Ervine has a basket of grapes. If she gives 6 grapes to each of her students, she will have 2 grapes left. If she gives 7 grapes to each of her students, she will have to buy 11 more grapes. A) How many students does Ms. Ervine have? B) How many grapes are in the basket?January 25, 2012

math
ben and glen are practicing short golf shots. they are aiming for a flag that is 110 yards away? they consider any shot between 105 and 115 yards to be accurate. here are their results in yards. ben: 110,130,88,105,108,110,118,100,120,103.and Glen: 95,105,108,110,106,110,108,...January 6, 2012

Grammar- Complete Sentences
Although the abscess was incised and drained in the emergency room and cultures were obtained, which grew coag-positive staphylococcus. A This is a run-on that needs a semicolon after time. B This is a run-on that needs to be split into two separate sentences. C This is a ...November 5, 2011